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A Met spokesman said the child had been unattended in the car for at least 10 minutes prior to police being called, and two small hinged windows had been left open.

After being given a check-up, the baby was taken into care but has since been returned to her mother.

Andy Howard, team leader for the wardens’ team, said: “A full statement was supplied to the police for their criminal investigation and paramedics praised the swift intervention and first aid supplied and indicated that without the caretaker noticing the baby and wardens attending the incident could have had far more serious consequences.”

The child’s father has been bailed pending further investigation and is due back in early October.